Unit 3 Test: Macromolecules
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Nucleic Acid
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Protein
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Carbohydrate
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Lipid
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Lugol's Iodine is placed on the cut side of a potato. What is likely to happen?
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The potato will turn black
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The potato will turn orange
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The potato will turn light purple
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There will be no color change
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A. The potato will turn blackExplanation
When Lugol's Iodine is placed on the cut side of a potato, the potato will turn black. This is because Lugol's Iodine reacts with the starch present in the potato, forming a dark-colored complex known as iodine-starch complex. This reaction is commonly used as a test for the presence of starch. Therefore, the black color change indicates the presence of starch in the potato.Rate this question:
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Mar 21, 2023Quiz Edited by
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Sep 22, 2013Quiz Created by
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